reynolds



(No Model.)

G. H. REYNOLDS. PLUNGBR ELEVATOR Patented Deo.7,1897.

3::5 Q l Will/; ""MV/ UNTTED STATES PATENT OEEICE.

GEORGE Il. REYNOLDS, OF CHICAGO, ILLINOIS, ASSIGNOR TO TI-IE CRANE ELEVATOR COMPANY, OF SAME PLACE.

PLU NG ER-ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 595,280, dated December 7, 1897. Application filed April 30, 1897. Serial No. 6 34,547. (No model.)

To c/,ZZ whom, it 19mg/ concern:

Be it known that l, GEORGE H. REYNOLDS, a citizen of the United States, residing in Chicago, Cool; county, Illinois, have invented 5 certain new and useful Improvements in Plunger-Elevators, of which the following, taken in connection with the accompanying drawings, is a specification.

My in venlion has particular relation to that xo class of elevators in which a weighted ram or plunger is used to raise the car, the car being lowered by hydraulic pressure acting so as to raise said ram or plunger. As the cylinder in this form of elevator must necessarily x5 stand vertical and, as in the preferred construction, the pulleys are so arranged that the plunger will be equal in length to onehalf the height of the building, considerable valuable floor-space would be wasted if it 2o were not possible to set the operating apparatus within the elevator-shaft, which is at one side of the car. In some cases the space available for this purpose is too narrow to admit of the free movement of a large sheave and 2 5 cross-head, if such sheave and cross-head are made of the usual construction. To overcome this diiiiculty, I have provided in the sheaveitself a circumferential groove extending around the middle of its face in such a 3o way as to divide the surface of the sheave in two parts and permit the guide-rails or T- irons to be brought closer together and the whole combined in a smaller space than would otherwise be possible.

3 5 Referring nowparticularl y to the accompanying drawings, Figure l represents a vertical section through the upper end of an elevator-plunger and its connected sheave having my improvements applied thereto, and Fig. 2 shows a section of the same on the line 4o 2 2 of Fig. l.

The guides of the cross-head (marked 3) are arranged as shown in Fig. l, the sheave 4: being constructed to travel up and down between the guides 3 as the plunger 5 is raised 45 and lowered. By an examination of Fig. 2 particularly it will be seen that I have arranged the sheave or pulley l with a circumferential groove G in its face to admit of its straddling the T-iron guides 8 Without inter- 5o ference with the operation of the sheave -l or the cables 7, which run around the same. This circumferential groove is made in the middle of the pulley, so as to make an equal number of turns on each side of the same, bal- 55 ancin g the strain upon the cross-head axle.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- In a plunger-elevator, the combination of 6o two vertical guide-rails, a sheave arranged to move vertically between said rails, and a circumferential groove in the face of said sheave constructed to straddle said rails, substantially as described.

GEORGE II. REYNOLDS.

Vitnesses:

LoUIs K. GILLsoN, PAUL SYNNEsTvEDT. 

